Machine for drilling holes in lenses.



PATENTED OCT. 18 1904.

I E. CLARKE. MACHINE FOR DRILLING HOLES IN LENSES.

. APPLICATION FILED APR.18,1904.

N0 MODEL.

5111 venlo a ra.

I LUitt-uzmmo UNITED j STATES,

Patented October 18, 1904.

PATENT OFFICE.

MACHINE FOR DRILLING HOLES IN LENSES.

' SPECIFICATION forming part of Letters Patent No. 772,784, dated October 18, 1904.

I Application filed April 18, 1904. Serial No. 203,779. (No model.)

' T (11 whom, it may concern:

Be it known that I, EDWARD CLARKE, a citizen of the United States, residing at Dunkirk, in the county of Chautauqua and State of New York,have invented certain new and useful Im provements in Machines for Drilling Holes in Lenses; and I do declare the following to be av full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an improved machine for drilling holes in lenses and other articles of glass or similar material; and it consists in the construction, combination, and arrangement of devices hereinafter described and claimed.

This machine is especially adapted for use for drilling holes for screws in lenses, but may be employed for other similar purposes, and I do not desire to limit myself in this particular.

In the accompanying drawings, Figurel is a perspective view of a drilling-machine embodying my improvements. Fig. 2 is a detail vertical sectional view of the same. Fig. 3 is a detail top plan view of the same, showing the base and the gage thereon, the standardbeing shown in cross-section.

The base 1, which is preferably of the form here shown, but which may be of any suitable form and size,'has its upper surface 2' plane. At one -side of the'base is a vertical standard 3, which has an arm 1 at its upper end that projects over the center of the base. At a suitable distance from its upper end the standard has an arm 5, which alines with the in an opening in the arm 4, near the outer end thereof, and to the upper end of the said spindle or shaft is swiveled and loosely connected a yoke 11, which comprises a base 12 and a pair of vertical lugs 13. At the outer end of the arm 4: is a bearing 14 for a vertically-adjustable stud 15, which may be set at any desired adjustment by means of a setscrew 16. To the upper end of the said adjusting-stud is pivoted one end of a lever 17, to which the lugs 13 of the yoke 11 are pivoted by means of a pivot-pin 18. Said leverarm projects rearwardly from the spindle and is provided at its rear end-with a suitable handle 19.

In the upper end of the standard is a vertical threaded opening in which is secured the depending stud 20 of an adjustable stop and guide 21, which is provided in its upper end with a vertical guide-slot 22, through which the lever 17 extends. The function of this guide and stop is to guide the lever when the same is moved downwardly and also predetermine the extent of its downward movement and the corresponding downward movementof the spindle or shaft 7, which carries the drill-point. The lens to be drilled is placed on the upper side of the base and is appropriately set thereon by means of a readily adjustable gage 23. Said gage has acurved inner side 24;, which corresponds in shape with one side of the lens and is provided with an adjusting-slot 25, which is engaged by a screw 26, that serves to screw the gage on the base at any suitable adjustment. The base is here shown as provided. with a center-point 27, which is directly in line with the point of the drill-tool and with agage-line 28, which intersects the said opening 27 and the axis of the gage.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

comprising abase forming a rest for the work, a standard having bearings disposed over the base, a revoluble drill-spindle journaledin the bearings and having means whereby it may be rotated, a lever and a connection between the latter and the drill-spindle to raise and depress the drill-spindle, means to adjust the pivot of said lever, and an adjustable stop for the said lever to predetermine the downward movement thereof and of the drill-spindle, I0 substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribilrg wit nesses.

EDWARD CLARKE.

\Vitnesses:

T. P. HEFFERNAN, ISABEL M. CLIFFORD. 

